Making the keyboard eject switch work

Question

I am using Linux.My keyboard switch for ejecting the CDROM does not work though it displays an eject button on the screen. I need to make it work. I know ejecting a cdrom using system call is as simple as

ioctl(cdromfd,CDROMEJECT,0)

But I don't know how to connect the an executable that contains the above system call and the event of pressing the eject key? Or shall I rely on kernel level? If then how?

Answer 1

you can use

system ("eject");

or

fp = popen("eject", "r");
close(fp);

Answer 2

You have to configure e.g. your desktop environment to catch the key, and call the eject command for the correct device. No programming needed.

To find out the key-code, use e.g. the xev command.

If you don't want the Eject key to be available generally, but only in a program you made, you have to add a check for keyboard events in your event loop and check for the keycode you got from xev.